2309679891 has 12 divisors (see below), whose sum is σ = 3532451832. Its totient is φ = 1449210816.

The previous prime is 2309679887. The next prime is 2309679917. The reversal of 2309679891 is 1989769032.

2309679891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2309679891 - 2² = 2309679887 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2309679821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7547821 + ... + 7548126.

It is an arithmetic number, because the mean of its divisors is an integer number (294370986).

Almost surely, 2^2309679891 is an apocalyptic number.

2309679891 is a deficient number, since it is larger than the sum of its proper divisors (1222771941).

2309679891 is a wasteful number, since it uses less digits than its factorization.

2309679891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15095970 (or 15095967 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 2309679891 is about 48059.1291119596. The cubic root of 2309679891 is about 1321.8553437984.

The spelling of 2309679891 in words is "two billion, three hundred nine million, six hundred seventy-nine thousand, eight hundred ninety-one".